Die and carrier.



E. HENK.

.m13 AND mama.

APPLICATON PYLHD IEB,10,1910.

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2 SHEETS-SHEET 2.

im m at@ SSGNOR TO '111-11431 NATIGNL ACME MANU'- DEE AND feRE/BER.

Specification o Letters Patent.

Application filed February l, 1111.0. Serial No. 543,928.

To @ZZ @from t concern 'Be .it lrnown that i, .Enwiri l. Heim, a citizen of the United States, 'rcsioing in Cleveland, in the county of Cuyahoga and @time of hio, have invented certain new end useful improvements in Dies and Carrifersa ofi 'which the following; .is a. specifica-- tion.

This i of the character llnown as opening, or seltopeningg', dies and has i'or its object to provide a tool of this character which will he simple in construction and can he easily operated; and at the saine time can he readily adjusted te take up 'for Wears-nd to change the diameter oit the thread cut.

lin the accompanying drawings showing one embodiment et my invention, Figure l. shows the die in side elevation, partly hrolicn away. iig. 2 is an end elevation, partly loi-chen away. 3 is a vertical section. Fig. "l is a view similar to Fig. 3 with the cha: in the open position. Fig. 5 shows separately the die body. Fig. 3 is'ao. end view et the dic-hotly, partly broken nvention relates to threadingd dies away. i is a side elevation of the head alone. -Fi 8 is an end elevation of the iead. Figs. 9, l and 1l show the carrier `for the dielchasers. Figs. .l2 and i3 show one of the die-chasers; and Fig. a form of' stop screw.

The device is shown comprising a diehoi'y 2 having 'tour guides -or ways 3, i., and 3 extending radially oi the die-body. rthe rear portions of these. waj-,f's are undercut, as shown at 5X in Fig. 5. lin these ways slide carriers 7, shown in Figs. 9--ll, having' extensions S and 9, which slide in the recess portions 5x tor retaining' the carriers in the ways. Each of these slides has, a. proi jecting pin l0, which engages coil spring placed in a here vl2 in the die-body. These springs tend to shift the carriers out- 14 shows Wardly from the axis of the body. In eachl of these carriers is secured a Chaser 13 that may he secured therein hy a screw Lt.

Means are provided for causing` the die chasers and carriersA to simultaneously advance toward the center or axis of the die, which will compress the springs. The coinpressed springs will react upon the die when the advancing inea-ns are withdrawn.. l'The die carriers are shown each provided with* a cani surface 15 at its outer portion.V Four cam surfaces are provided, such as pins 16 secured in suitable bores 17, in the h'ead .member denoted generally by The headineinher comprises a sleeve 'i9 having a shell 2O inclosing the dietody and chasers; and also a iiange :Z1 forming;l an annular groove Q2 for engagement wi* device to shift the head axially on the diebody. The springs ll will press the diechasers and their carriers outwardly and cause engagement oli the cooperating` cai-n surfaces, as indicated in llig. el. in which the chasers are in open position. Upon the hea-d being moved forwardly or toward the chasers, the pins 1G engaging the earn surfaces l5 will press the dies simultaneously inwardly toward the center or exis of the die, and bring them to their closed position, Asee Fig. 3, wherein the pins avflat portion Q3 of the carriers :for the chasers. In this position the chasers will he4 held in their closed pos tion. Upon the head being drawn rearwardly, the springs will press the carriers outwardly and the cam surface l5 will permit thc chasers to ret-urn to thc open position.

A djustahlo nie-:ins are preferably proifidcd for limiting` the inward i'uoveinent oit the die-chasers and carriers, which is ellected hy having` a' screw 2d working in a threaded vbore in the die body, its inner end ahnti ting;` the shell 2O of the head-and limit-ing the .closing movement of the die body and head. The i'ace Q3 ot the carrier engaged by the cani 1G is preferably made on a slight taper whereby a fine adjustment oi' the position oi the Chaser when closedcan he produced. Means are also preferably provided for limiting the opening movement of the head and die-hody. A holt 2'. passesI through a bore 28 in the die-body and sea-ted in a threaded hole 29 in the head. The head of the screw engaging' a counteu sunk portion of the bore will limit the sep-- arating movement oi the head and die-body.

By forming the cams as pins they can, in Case of wear, be yquickly and easily removed and replaced without interfering with the kother mechanism of the die, and this cannot be as readily or as quickly done with other forms of dies. Not only this, lout it is a very simple operation to insert these cam pins in their proper position during' the manufacture of the cani cap, thus obviating the necessity of constructing the cani cap and cams in one piece, which would th a suitable operating'.

ico

cam cap, 'which is a very and if one or more of such lis very much more simple and such worn cam members can be more readily and uickly replaced, so that the oost of manufacture and assembling of the die is very much lessened and the structure can be readily cleaned and re-assembled in a few minutes as compared with several hours usually heretofore necessary' in the cleaning and re-assembling of dies of this general character.

Having thus described my invention, l claim:

1. The combination a rearwardly extending shank and provided with undercut ways, members provided with thread-cutting means and having lateral extensions projecting into said undercut ways and movable radially of the body, a head slidable on said shank and having a shell. encircling substantially the whole of said body, said members and head each having one a tapered surface and the other a surface cooperating therewith to move said members inwardlv, cated at the sides of the ways for movingr said members outwardly, and means eX- tending through the body from front to rear thereof and in engagement with rear of the shell f or limiting the movement of said slidable head.

2. The combination of a die-body pro-- vided with undercut 'ways and having a rearwardly extending shank, members provided with thread-cutting means and having lateral extensions projecting into said undercut ways and movable radially in said body and each provided at its side with a projection, a spring carried by the body at` one side of each way for engaging said projection to move the thread-cutting members outwardly from the center, each of said members having a tapered surface, a sliding shell encircling substantially the whole of said body and having surfaces on the inner sidethereof coperating with the tapered surfaces of said members for moving the members inwardly against the action of the springs and independent means extending through the body from front to rear thereof for limiting respectively the forward and rearward movements of said slidable head.

3. The eombinationof a die-body pro- `vided -with undercut ways and having a ruirwardly extending shank, members proof a die-body having springs lo#` vided with thread-cutting means land havins,r lateral extensions projecting into said 1undercut ways and movable radially in Said body and each provided at its side with a projection, a spring carried by the body at one side of each way for engaging said project-ion to move the thread-cutting members outwardly from the center, each of said members. having a tapered surface, a sliding shell encircling substantially the whole of said body and having round cams carried by and projecting transversely of the axis of the shell for coperating with they tapered surfaces of said members for moving the members inwardly against the action of the springs and independent means evtending through the body from front to rear thereof for limiting respectively the forward und rearward movements of said slidable head.

il. The combination of a die body provided with radiallydisposed ways, members provided with thread-cutting means mov able in said ways, a head slidable longituditbe said members outwardly from the center, cam surfaces between the head and said members for moving the members inwardly upon relative sliding movement of the head and die body, a screw adjustable in the die body and arranged to engage the head to limit the movement of the head on the die body in one direction, and a screw passing through an aperture in the die body and secured in the head. for limiting the movement of the members in the opposite direction.

5. The combination of a die body pro- Ivided with ways, members provided with thread-cutting means slidable in the ways toward and from the center, a head slidable on the die body and inclosing said members, said members being provided with tapered portions and the head being provided with cams coperating upon the relative sliding movement of the head and die body, springs for pressing said members outwardly to retain said cams and tapered surfaces in engagement, the die body having a threaded bore, a'serew operating in said bore for engaging the head and limiting the movement of the head and die body in one direction, the die body having a bore therethrough, and a bolt passing through said bore and secured'i'n the head for limiting the separating movement of the die body and head.

5. The comlination of a die-body having a rearwardly extending shank and provided with undercut ways, members provided with thread-cutting means and having lateral extensions projecting into said undercut w` and movable radially of the body, a' head slidablc on said shank and having l a :lliell encircling substantially the 'nally on the die body, springs for movingV whole of said body, said members and head having one a tapered surface and the other a surface cooperating therewith to move 'the said members inwardly, springs located at the sides of the Ways for moving; said members outwardly, and an adjustable device projeotingK through the body from the front thereof and engaging the rear wall of the shell for limiting the movement of the hea d.

7, rlhe combination of a die-body having a rearwardly extending shank and provided With undercut ways, members provided With thread-cutting means and y eral extensions projecting into said undercut Ways and movable radially of the body, a head slidable on said shank and having a shell encircling substantially the whole of said body and having integral therewith a grooved portion for sliding said head,

ha ving' lat,

said members and head having one a tapered surface and the other a surface cooperating therewith to move the said members inwardly, springs located at the sides' oi. the ways for moving said members outwardly, an adjustable screw passing through the body from the engage the rear Wall of the head to limit the forward movement of the head on the die-body in one direction, and an adjustable screw'turned into said rear Wall and havingits head engaging a part of said diebody to limit the rearward'movement of such head.

EDWIN `o. HENN.

Witnesses VV R. MITCHELL, YV. F. MCMILLAN.

front thereof to 

